As the sun climbs higher, San Diegans can expect the mercury to follow suit, with a slight uptick in temperatures today. Most low clouds are expected to clear out, save for some persistent patches that might grace the coastline in the afternoon. High pressure is building in the region, and that means warmer days ahead, particularly for the valleys and inner desert, setting the scene for what could be a quintessential southern California weekend, the NWS San Diego reports.
The marine layer is hanging in there, albeit thinly, giving coastal dwellers a bit of morning mist before making a hasty retreat by mid to late morning. Heading east, the Inland Empire (IE) is bracing for temperatures that might tip the scales at 100 degrees, specifically near San Bernardino and Riverside, says the Area Forecast Discussion from the National Weather Service in San Diego, while noting that the marine layer clouds could sneak into the IE overnight.
A cooling trend is on the horizon next Tuesday, made possible by a quasi-stationary upper-level trough over the Pacific waters west of Pt. Conception, which will start dragging temperatures down about 5 degrees to more seasonable averages. As the week unfolds, San Diegans should prepare for an enhanced onshore flow and a thicker marine layer, which could result in some coastal drizzle or even a stray shower or thunderstorm in higher terrains and deserts, though the overall upper-level low seems to be less than generous in moisture content.
On the aviation front, pilots and passengers should be aware of the low clouds, which based around 800-1000ft MSL, are sneaking into valleys and coastal basins, with visibility dropping to between 2-3SM, notably on coastal mesas and valleys intersecting with terrain, as for the clear skies they should return to beaches by this afternoon, though San Diego beaches could see low clouds linger, the marine layer's nocturnal dance is set to repeat tonight, moving inland up to 5-10 miles after 04z, making for a subtle yet spirited tango with the San Diego skyline.
Out on the waters, sailors might experience some northwest breezes kissing the outer coastal waters near San Clemente Island come Sunday afternoon and evening, speeds reaching 15 to 18 knots. Other than that, the Pacific is expected to stay rather tame through Wednesday, as the NWS San Diego assures no hazardous marine conditions are anticipated. Skywarn has not been activated, yet spotters remain on their ever-vigilant watch, and they are encouraged to report significant conditions as they arise.
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